/**
 * Copyright 2010-present Facebook.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.facebook.internal;

import java.util.Collection;

/**
 * com.facebook.internal is solely for the use of other packages within the Facebook SDK for Android. Use of
 * any of the classes in this package is unsupported, and they may be modified or removed without warning at
 * any time.
 */
public final class Validate
{
  public static void notNull(Object arg, String name)
  {
    if (arg == null)
    {
      throw new NullPointerException("Argument '" + name + "' cannot be null");
    }
  }

  public static <T> void notEmpty(Collection<T> container, String name)
  {
    if (container.isEmpty())
    {
      throw new IllegalArgumentException("Container '" + name + "' cannot be empty");
    }
  }

  public static <T> void containsNoNulls(Collection<T> container, String name)
  {
    Validate.notNull(container, name);
    for (T item : container)
    {
      if (item == null)
      {
        throw new NullPointerException("Container '" + name + "' cannot contain null values");
      }
    }
  }

  public static void containsNoNullOrEmpty(Collection<String> container, String name)
  {
    Validate.notNull(container, name);
    for (String item : container)
    {
      if (item == null)
      {
        throw new NullPointerException("Container '" + name + "' cannot contain null values");
      }
      if (item.length() == 0)
      {
        throw new IllegalArgumentException("Container '" + name + "' cannot contain empty values");
      }
    }
  }

  public static <T> void notEmptyAndContainsNoNulls(Collection<T> container, String name)
  {
    Validate.containsNoNulls(container, name);
    Validate.notEmpty(container, name);
  }

  public static void notNullOrEmpty(String arg, String name)
  {
    if (Utility.isNullOrEmpty(arg))
    {
      throw new IllegalArgumentException("Argument '" + name + "' cannot be null or empty");
    }
  }

  public static void oneOf(Object arg, String name, Object... values)
  {
    for (Object value : values)
    {
      if (value != null)
      {
        if (value.equals(arg))
        {
          return;
        }
      }
      else
      {
        if (arg == null)
        {
          return;
        }
      }
    }
    throw new IllegalArgumentException("Argument '" + name + "' was not one of the allowed values");
  }
}
